CN205448960U - Coaxial demarcation sensor - Google Patents
Coaxial demarcation sensor Download PDFInfo
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- CN205448960U CN205448960U CN201521116051.7U CN201521116051U CN205448960U CN 205448960 U CN205448960 U CN 205448960U CN 201521116051 U CN201521116051 U CN 201521116051U CN 205448960 U CN205448960 U CN 205448960U
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Abstract
The utility model discloses a coaxial demarcation sensor, the direction of following laser transmission includes in proper order: absorb speculum, light filter and CCD chip, it is the glass to basic frequency laser and two doubling of frequency laser hypersorptions to absorb the speculum, absorb reflection mirror surface and plated the high anti - membrane of frequency tripling laser, the light filter is the glass to frequency tripling laser fractional absorption, the device and method for reliable and simple, convenient operation, the large -scale laser driver high -precision laser target practice technical field's of specially adapted the coaxial demarcation of a lot of shu jiguang target surface.
Description
Technical field
This utility model relates to inertial confinement fusion (ICF) large laser driver high-precision laser Knockout technology field, in particular to the coaxial calibration sensor of one.
Background technology
The thought of inertial confinement fusion is the high density utilizing energetic particle beam that DT target ball was compressed within the time of several nanoseconds every cubic centimetre of several hectograms, and pressure is several hundred million atmospheric pressure, so that pellet is fought burning being partially formed hot spot point.
Along with the appearance of laser technology, people begin one's study and utilize the very high power density of light laser and fabulous directivity to bombard deuterium-tritium target, allow them produce controlled inertial confinement fusions thus discharge fusion energy, here it is " laser-produced fusion ".
In order to multiple laser being directed on the target of a diameter of millimeter of magnitude, need special precision instrument to realize bundle target coupling to guide, owing to incident laser power is higher, after focusing at target spot, energy is stronger, directly cannot guide with instrument, it is therefore desirable to couple a road low-yield but with incident laser coaxially with the simulated laser on corrugated to replace main laser to carry out light beam guiding.In view of main laser and simulated laser exist certain system deviation, it is therefore desirable to adjust main laser at target spot and simulated laser is completely superposed or calibrates both errors to carry out system correction.
Utility model content
For above-mentioned problems of the prior art, this utility model provides a kind of coaxial calibration sensor, this utility model is simple, easy to operate, and a lot of Shu Jiguang target surface being particularly well-suited to large laser driver high-precision laser Knockout technology field is coaxially demarcated.
For achieving the above object, the following technical scheme of this utility model offer:
A kind of coaxial calibration sensor, direction along Laser Transmission includes successively: absorb reflecting mirror, optical filter and CCD chip, described absorption reflecting mirror is to basic frequency laser and the glass of two double-frequency laser hypersorptions, described absorption mirror surface is coated with frequency tripled laser high-reflecting film, and described optical filter is the glass partially absorbing frequency tripled laser.
Further, the image planes of described CCD chip and target chamber center are relative to described absorption mirror conjugation.
Further, described optical filter is 50% to the transmitance of frequency tripled laser.
Further, the thickness of described optical filter is 3-4mm.
Separately, this utility model also provides for a kind of method utilizing above-mentioned coaxial calibration sensor to carry out laser calibration, including: after condenser lens be calibrated laser light incident to absorb reflecting mirror, absorb the reflecting mirror basic frequency laser to being calibrated in laser and two double-frequency lasers absorb, and frequency tripled laser is reflexed to optical filter, after frequency tripled laser is partially absorbed by optical filter, remaining frequency tripled laser is incident to CCD chip, CCD chip gathers the focal spot of frequency tripled laser, then the focal spot of simulated laser is gathered, simulated laser is adjusted by the position deviation being calibrated between laser and simulated laser by calculating.
Further, described optical filter is 50% to the transmitance of frequency tripled laser.
The beneficial effects of the utility model are as follows:
1, this utility model uses the fundamental frequency part and two frequency multiplication parts absorbed in the superlaser that mirror absorption is calibrated, the frequency tripling part only carrying out demarcating by needs reflects, and eliminates fundamental frequency part and the interference to the information gathering of CCD chip of the two frequency multiplication parts；
2, this utility model uses optical filter to partially absorb frequency tripled laser, incides the laser energy in CCD chip to reduce, it is to avoid the superlaser damage to CCD chip；
3, the image planes of CCD chip and target chamber center are arranged by this utility model relative to described absorption mirror conjugation, it is achieved coaxially demarcate, the practical situation of two laser when the spacing of two focal spots obtained from CCD chip and size can reflect target practice.
Accompanying drawing explanation
Fig. 1 is overall structure schematic diagram of the present utility model；
In figure: 1 projection reflecting mirror, 2 condenser lenses, 3 absorb reflecting mirror, and 4 optical filters, 5 CCD chip, 6 target chambers, 7 simulated lasers, 8 are calibrated laser.
Detailed description of the invention
In order to make those skilled in the art be more fully understood that the technical solution of the utility model; below in conjunction with accompanying drawing of the present utility model; the technical solution of the utility model is carried out clear, complete description; based on the embodiment in the application; other similar embodiment that those of ordinary skill in the art are obtained on the premise of not making creative work, all should belong to the scope of the application protection.
Embodiment one:
As it is shown in figure 1, a kind of coaxial calibration sensor, the direction along Laser Transmission includes successively: absorb reflecting mirror 3, optical filter 4 and CCD chip 5, and before coaxial calibration sensor, laser also sequentially passes through projection reflecting mirror 1 and condenser lens 2.Owing to laser is multi beam, so projection reflecting mirror 1 therein, condenser lens 2 can be multiple, absorb reflecting mirror 3 and be designed as hollow circular, described absorption reflecting mirror 3 is to the basic frequency laser being calibrated in laser 8 and the glass of two double-frequency laser hypersorptions, described absorption reflecting mirror 3 surface is coated with the frequency tripled laser high-reflecting film being calibrated laser 8, reflectance to frequency tripled laser is more than 95%, basic frequency laser and two double-frequency laser reflectance are about 4% simultaneously, described optical filter 4 is the glass partially absorbing the frequency tripled laser being calibrated laser 8, described optical filter 4 is 50% to the transmitance of frequency tripled laser, basic frequency laser and two double-frequency lasers of optical filter 4 are reflexed on a small quantity by absorption reflecting mirror 3, filter plate 4 absorbs again, reach to filter basic frequency laser and the purpose of two double-frequency lasers completely.If basic frequency laser and two double-frequency lasers are not filtered, CCD chip 5 can occur basic frequency laser, two double-frequency lasers and the focal spot of frequency tripled laser simultaneously, only frequency tripled laser is for the target practice of inertial confinement fusion, therefore, the focal spot of basic frequency laser and two double-frequency lasers can have a strong impact on the testing result of CCD chip 5.Simultaneously, for practice shooting to be calibrated laser 8 energy the highest, if being directly used in demarcation, may exceed the damage threshold of CCD chip 5, cause the damage of CCD chip 5, therefore this utility model utilizes absorption reflecting mirror 3 to absorb basic frequency laser and two double-frequency lasers, remove both impacts on final detection result, optical filter 4 is utilized to partially absorb frequency tripled laser, to reduce the energy being calibrated laser 8, it is to avoid CCD chip 5 is damaged.It is 50% that this utility model chooses optical filter 4 to the transmitance of frequency tripled laser, i.e. focuses on frequency tripled laser energy in CCD chip 5 and is about 0.5 micro-Jiao, and the laser facula of this energy level can be processed by CCD chip 5.Optical filter 4 is 50% to be because the transmitance of frequency tripled laser: if transmitance is too low, then the frequency tripled laser passed through is less, and in CCD chip 5, imaging effect is poor, causes the problems such as hot spot obscure boundary Chu；If transmitance is too high, frequency tripled laser occurs, when accidental energy is higher, to damage CCD chip 5.The image planes utilizing described CCD chip 5 are conjugated relative to described absorption reflecting mirror 3 with the center of target chamber 6, the i.e. image plane center of CCD chip 5 is perpendicular to absorb reflecting mirror 3 with the line at target chamber 6 center, and the midpoint of its line is positioned on absorption reflecting mirror 3, this conjugation setting is capable of accurate coaxial demarcation, the practical situation of two laser when the spacing of two focal spots obtained from CCD chip 5 and size can reflect target practice, simplify regulation process, it is to avoid the troublesome calculation during regulation.
Optical filter 4 is arranged between absorption reflecting mirror 3 and CCD chip 5 by this utility model, the purpose so arranged is: be calibrated laser 8 after condenser lens 2, beam size is from large to small, optical filter 4 is arranged between absorption reflecting mirror 3 and CCD chip 5, optical filter 4 is possible not only to realize absorbing the effect being calibrated laser 8, the bore of optical filter 4 can also be obviously reduced, reduce cost, simplify the installation process of optical filter 4.
Optical filter 4 uses ZWB2 material, and thickness is 3-4mm, and the face depth of parallelism is less than 5 ", the PV value of surface precision is less than λ/5, and λ is the wavelength being calibrated laser 8.Optical filter 4 is by being adhesive on bearing, and bearing is connected with the shell of CCD chip 5 by screw, it is simple to removes and changes.Absorbing reflecting mirror 3 and select ZWB2 glass, absorb the external diameter 196mm of reflecting mirror 3, internal diameter 34mm, thickness 8mm, the PV value of surface precision is less than λ/5.
nullSeparately，This utility model also provides for a kind of method utilizing above-mentioned coaxial calibration sensor to carry out laser calibration，Including: the laser 8 that is calibrated after projection reflecting mirror 1 and condenser lens 2 incides absorption reflecting mirror 3，Absorb the reflecting mirror 3 basic frequency laser to being calibrated in laser 8 and two double-frequency laser hypersorptions，It is coated with frequency tripled laser high-reflecting film owing to absorbing reflecting mirror 3 surface，Therefore absorb reflecting mirror 3 and frequency tripled laser is reflexed to optical filter 4，The most a small amount of basic frequency laser and two double-frequency lasers are also reflected onto optical filter 4，Frequency tripled laser is partially absorbed by optical filter 4，After basic frequency laser and two double-frequency lasers are all absorbed，Remaining frequency tripled laser is incident to CCD chip 5，CCD chip 5 gathers the focal spot of frequency tripled laser，Then the focal spot of simulated laser 7 is gathered，The coaxial deviation being calibrated laser 8 with simulated laser 7 is calculated by the position deviation measured between the two，Adjust simulated laser 7 to point to，It is made to overlap with being calibrated laser 8 focal spot position，Thus realize being calibrated the most coaxial of laser 8 and simulated laser 7.Meanwhile, make its focal spot size with to be calibrated laser 8 identical by regulation simulated laser source matched lenses, thus realize and the same corrugated being calibrated laser 8.
Utilizing sensor of the present utility model and scaling method, it is achieved that be calibrated the most coaxial and same corrugated of laser and simulated laser, coaxial precision is in 1 pixel (being equivalent to 4 microns) range of error, with corrugated precision in 4 micrometer ranges.
In addition, it is to be understood that, although this specification is been described by according to embodiment, but the most each embodiment only comprises an independent technical scheme, this narrating mode of description is only for clarity sake, description should can also be formed, through appropriately combined, other embodiments that it will be appreciated by those skilled in the art that as an entirety, the technical scheme in each embodiment by those skilled in the art.
Claims (4)
1. a coaxial calibration sensor, it is characterized in that, direction along Laser Transmission includes successively: absorb reflecting mirror, optical filter and CCD chip, described absorption reflecting mirror is to basic frequency laser and the glass of two double-frequency laser hypersorptions, described absorption mirror surface is coated with frequency tripled laser high-reflecting film, and described optical filter is the glass partially absorbing frequency tripled laser.
Coaxial calibration sensor the most according to claim 1, it is characterised in that the image planes of described CCD chip and target chamber center are relative to described absorption mirror conjugation.
Coaxial calibration sensor the most according to claim 1, it is characterised in that described optical filter is 50% to the transmitance of frequency tripled laser.
4. according to the arbitrary described coaxial calibration sensor of claim 1-3, it is characterised in that the thickness of described optical filter is 3-4mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521116051.7U CN205448960U (en) | 2015-12-29 | 2015-12-29 | Coaxial demarcation sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521116051.7U CN205448960U (en) | 2015-12-29 | 2015-12-29 | Coaxial demarcation sensor |
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| Publication Number | Publication Date |
|---|---|
| CN205448960U true CN205448960U (en) | 2016-08-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521116051.7U Expired - Fee Related CN205448960U (en) | 2015-12-29 | 2015-12-29 | Coaxial demarcation sensor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105423922A (en) * | 2015-12-29 | 2016-03-23 | 中国工程物理研究院激光聚变研究中心 | Coaxial calibration sensor and laser calibration method |
-
2015
- 2015-12-29 CN CN201521116051.7U patent/CN205448960U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105423922A (en) * | 2015-12-29 | 2016-03-23 | 中国工程物理研究院激光聚变研究中心 | Coaxial calibration sensor and laser calibration method |
| CN105423922B (en) * | 2015-12-29 | 2019-03-15 | 中国工程物理研究院激光聚变研究中心 | A kind of coaxial calibration sensor and its method for carrying out laser calibration |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160810 Termination date: 20161229 |